Dynamo-electric machine.



H. McQUlLLIN.

DYNAMO ELECTRIC MACHINE.

APPLICATION FILED MAR. 15. 1915.

Patented Nov. 7,191.6,

[p (5% d M HOWARD MCQUILLIN, OF CHICAGO, ILLINOIS.

DYNAMIC-ELECTRIC MACHINE.

Application filed March 15, 1915. Serial Nb. 14,306.

To all whom it may concern:

Be it known that I HOWARD MCQUILLIN, a

' citizen of 'th e United States, residing at Chicage, in'the county ofCook and State of ilhnois, have invented certain new and usefulimprovements n Dynamo-Electric Machines, of which the following is aspecification.

My invention relates to improvements indynamo electric machines-and moreparticularly to a generator in which the armature is endwise movable.

One of the particular objects of my invention is to provide a positiveand etlicient driving connection be-Aveen'a pulley, gear or the like andthe she. t of an axially movable armature, such as illustrated anddescribed in my copending application entitled Dynamo electric machines,filed by me March 13th, 1914-, and serially Numbered 82%,421.

Another object of my invention is to pro:

vide improved oiling means for proper lubrication of the axiallyshiftable shaft so that lubricant is conducted to the bearings fromreservoirs when the armature is rotating, the supply being cut ofl' whenthearmature is idle, and the consequent tendency for oil to pass intothe interior'of the dynamo casing prevented.

Another ob ect of my invention 1s the provision of improvedcommutatingmeans by which the field current value is automaticallyregulated. Other and further obj cts will become apparent to thoseskilled in the art from a consideration of the following description anddrawings, wherein Figure 1 is an axial sectional view of my improveddynamo. Fig. 2 is an axial sectional yiew taken on a plane at 90 degreesto the plane on which Fig. 1 is taken, and Fig. 3 is a'transversesectional view on the line 33 of Fig. 1.

Referring to the drawings the numeral 10 indicates the frame of a dynamoelectric machine from which extend inwardly the pole pieces 11-11carrying the field Wind'- ings 12-12. An inclosing head 13 extends from"the commutator end of the field supporting casing inwardly, and notonly incloses the armature at that end but also provides support for ashaft bearing. A. similar cap or casing head 14 is provided at the otherend of the dynamo frame.

Specification. of Letters Patent.

Patented Nov. 7, 1916.

The armature 15 is provided with a shaft 16 which extends as at 17considerably beyond the bushing 18 carried by the head 14 and at theother end extends as at 19 a distance greater than the length ofthebushing 20 carried in the head 13.

The bushing 18 is positioned within the hub 21 which extends outwardlyfrom the head 14k and has journaled on its periphery a drive pulley 22from which projects a tubular hub 23 over which is screw threaded a cap24h Obviously this part through which power is applied to the apparatusmay be either a gear, a clutch member, or a coupling of any suitableform.

A pin 25 extends through a holedrilled in the end 17 of. the armatureshaft into engagement with diagonally positioned diametricallyoppositeslots 2626 in the pu lley hub 23. Inclosed within the pulley hub23 is a coil spring 27, the inner end of which abuts against a shoulder28 provided on the interior of the pulley, the outer end abuttingagainst the pin 25.

The tendency of this spring is to normally hold the armature in theposition indicated in Fig. 1 with the pin 25 at the outer end of theslots 2626.

At the commutator end of the dynamo a bushing 20 is carried withinthehub 29 which projects outwardly from the-casing head 13 and has threadedupon its periphcry a lubricant inclosing cap 30.

A portion ofthe end 17 of the shaft 16 is spirally grooved as at 31, theinner end of the spiral being terminated at a point which registers withan annular groove 32 formed in. the bushing 18 at a point near its innerend,'v.'h:. n the armature is in its inner operating position. The outerend of the spiral groove 31 at all times communicates with the lubricantreceiving chamber 83 providedber 33. From the above description it willmunicates through a slot 35 with the chambe evident that lubricantnormally flows through the slot 35 into the hole 3%, thence into theannular groove 32, and when the armature is in its operative position asin dicated in Fig. 2, is then carried outwardly along the spiral groove31 and returned to the oil chamber, the spiral being directed so as toact as a screw and draw the oil from the inner end outwardly whenrotated in the direction indicated by the arrow in Fig.1. Obviously ifthe armature is to be rotated in the opposite direction the directionof. the spiral groove 31 will be reversed. v

A similar provision is made for lubricating' the other end of the shaft19 by means of 'a spiral groove 37, the inner end of which, when thearmature is in, its operating position, registers with the annulargroove 38 in the inner face of the bushing 20. The inner end of thecasing hub 29 and the bushing is extended inwardly a suiiicient distanceas at 39 so as to cover the inner end of the groove 37 when the armatureis idle as in Fig. 1 and prevent communicationbetween the lubricantchamber 40 Within the end of the cap 30 and the interior of the armaturecasing. A slot ail extends along the inner face of the hub 29 and itsinner end registers with an opening 42 communicating with the annulargroove 38. @bviously the spiral 37 is inclined in an opposite directionfrom the inclination of spiral 31, as at this end the tendency to movethe lubricant axially must be in the opposite direction, namely from the3%; inside out or to the right. H

As in my previously referred to earlier application I have provided aninsulated extension 43 on'the end of the commutator 44-. Normally whenthe armature is idle as shown in Fig. l the line brushes 425%5' rest onthe insulated extension as whereas the field 'eX citation brushes 46-46at all times register with the commutator segments 5%. Current .v flowsfrom the field excitation brushes d6 4:6 over wires 47%? through thefield 'windf ings 1212. In the particular embodiment of-my invention itwill be noted that the field excitation brushes 46l6 are very muchsmaller than the main brushes 45-45, the area of the fieldexcitationbrushes being relatively small in order to cut down. or limitthe amount of current that may be supplied to the field and thus act asa regulator at high speed.

y In this particular embodiment of my invention I have shown the mainbrushes 45 45 as being; connected by means of the leads LS-48 to theopposite terminals of a storage battery 49. This circuit is constantlyclosed except when the armature slides axially to the leftas in Fig. land ihterposes the insulated section 43 between the brushes 1-5v 4'5,thus automatically, acting as a cut out, when the rotation of thearmature is so low as to provide insufficient excitation of an quickmaking of the contact between normal operation is in position in the co.

aces es field to overcome the resistance of the s 527. l i ires 50, 51are shown as connee the opposite terminals of the battery supplyingcurrent to translating dev a switch 53 being interposed in th When thearmature is at rest it previously described, assume the shown in 1 l,the spring 2? servin hold it at the left end oi? its rnoveme, the pulleywheel 22 is driven in the or of the arrow indicated in 1, the willgradually be built up due to r magnetism, thus ell cting a solenoi mgaction which the arn center or the magnetic held its dis a increases themagnetic will beco greater and the resistance between the pin 25 andslots 26-26 thereby increased. givil the screw or cam action of theslots op tunities to throw the armature inward a hold it in its normalposition. This gives brushes l5-l5 and the commutator diagonalpositioning of the grooves or si likewise prevents the armature from melaterally back and forth with small variations, and the armature doesnot tially or entirely return to its first posi until the speeddecreases materially thu weakening the field excitation current very lowvalue. The armature during of the field and the magnetic drag assikeeping the pin locked at the inner end oi? its slot. a

Having described my invention, what it. .laiin isz- 1. In a dynamoelectric machine, the comoination of a rotatable and endwise mov-- ableshaft, an armature mounted thereon bearing for said shaft, and a spiraloil groove formed on the shaft, the inclination of the groove outwardlyfrom the sauna being away from the direction of rota i and its inner endterminating at a oohrt aall times within the'axial confines oi thehearing. I

2. In a dynamo electric machine, the com bination of a rotatable andendwise movable shaft, an. armature mounted thereon, a ing for saidshaft, an annular groove formed Within said bearing adjacent its innerend, means for supplying oil to said groove, and a spiral groove formedon the portion of the shaft adjacent the bearing, the inclinw tion ofthe groove outwardly from the or mature being away fro'm the directionof rotation and its inner end, positioned a point registering with theaforesaid annular groove in the hearing when the shot; is in itsoperative'position.

3. In a dynamo electric machine, the combination of a rotatable, endwisemovable shaft, an armaturevmouuted thereon, means for resfiientlyholding the shaftat one 63 13:0

treme end of its movement, means operable upon the rotation of the shaftfor moving reServ ir, a duct leading from said reservoir to the annulargroove, and a spiral oil groove formed on the shaft, the inclination. ofthe groove outwardly from the armature being away from the direction ofrotation, its inner end being positioned on the shaft for registeringwith the annular oil groove when the shaft is in its last mentionedposition and the other end of the oil groove extending beyond thebearing.

4. In a dynamo electric machine, the combination of a rotatable endwisemovable armature shaft, a rotatable power transmitting means rotatabletheieabout, said means having diametrically opposite inclined surfacesthereon, projections on the shaft in sliding engagement with thesurfaces and means within the confines of said power transmitting meansfor resiliently holding the projections at the outer end of thesaidsurfaces.

5. Inv a dynamo electric machine, thecombinationof a rotatable endwisemovable armature shaft, adrive means having a tubular projectionrotatable thereabout, said drive means having diametrically OPPOSIEGslots formed therein, projections on the shaft in sliding engagementwith the slots, said drive means having an abutment formed within, and acoil spring-positioned within the tubular extension and abutting at oneend against the abutment on the drive means and at its other end againstsaid projections on the shaft.

6. A device of the character described comprising a rotor and a housinginclosing the same, a rotor carrying shaft supported at each end in thehousing, a lubricant retaining member overlying one end of the shaft andsecured to the housing. and a rotatable member connected to'andinclosing the opposite end 'of the shaft, said member being rotatablysupported on the housing.

7. A device of the character described comprising a rotor and a housinginclosing the same, a rotor carrying shaft supported at each end in thehousing, and a rotatable member connected to and completely inclosingone end of the shaft, said member being rotatably supported on thehousing.

8. A device of the character described comprising a rotor, a housinginclosing the same and having a hub projecting from each end of thehousing. a rotor carrying shaft journaled in said hubs, a lubricantretaining cap overlying the end of one of said hubs and inclosing theshaft end, a tubular rotatable member connected to the shaft andjournaled on the other hub, and a cover for the projecting end of saidmember.

9. The combination with a rotor and a frame having a projection thereonof a rotor carrying shaft extendingat one end through the projection. arotatablemember journaled on the projection, and means connect ing theshaft and membe and preventing outward axial disj'ilacement of thelatter.

10. The combination with a rotor and a frame having a projectionthereonof a rotor carrying shaft, journaled at one end in theprojection, a. rotatable member journaled on the projection, and meansconnecting the shaft and member and preventing outward axialdisplacement of the latter with respect to the shaft.

11. The combination with a rotor and a frame having a projectim thereonof a rotor carrying shaft extending at one end through the projection, arotatable member connected with theshaft and journaled on theprojection, and means rotatable with the said member for preventingaxial displacement thereof.

12. The combination with arotor and a frame having a projlection thereonof a rotor carrying shaft extending at one end through the project-ion,a rotatable member connected with the shaft and journaled on theprojection, said frame havingan abutment against which the rotatablemember abuts, and'resilicnt means for holding said member in engagementwith the abutment.

13. The combination With a rotor and a rotor inclosing housing having atubular hub pro ecting therefrom of a rotor carrymg shaft ournaled atone end in the hub,

a power transmitting member journaled on the hub, and a flexibleconnection between the shaft and said member.

14-. The combination with a rotor, and a rotor inclosing housing havinga tubular hub projecting therefrom of. a rotor carrying shaft journaledat one end in the hub, a power transmitting memberjournaled on the-huband having a tubular projection, a connection between saidshaft andmember, and a lubricant retaining cap overlying the end of the tubularprojection.

15, The combination with a rotor and a rotor inclosing housing having a,tubular hub projecting therefrom a rotor carrying shaft journaled at oneend in the hub,

means having an abutment thereon, and a. spring positioned entirelyWlillllfi the trans-- initting means and contacting at its ends with theprojection on the shaft and the abutment Within the power transmittingmeans to press the latter resiliently in contact with the abutment onthehousing.

18. Thecombination with a rotor and a rotor inclosing frame having atubular hub projecting therefrom of a rotor oarrying shaft journaled atone end in the hub, a pulley journaled on the hub and having a tubularextension projecting therebeyond, a

cover eep overlying the tubular extension and means connecting thepulley and shaft 'and entirely inclosed Within the confines of the saidcap.

19. The combination with a rotor and a rotor inclosing frame having atubular hub projecting therefrom of a rotor carrying shaft journaled atone end in the hi l; pulley journaled on the hub and harm tubularextension projecting therebeyn and provided With axially extending h, acover cap overlying the tubular extension said hub having a shoulder onthe inner end thereof'againstwhich one end of the pulley abuts, a pincarried by the and projecting into engagement with the a: :1 extendingslots inthe tubular extensioin pulley having an abutment on the in 1%thereof beyond the hub, and a spring taeting'at its ends with the innerabutment and the pinto press the pulley into engage-- ment with theshoulder.

In testimony whereof I hereunto set 1 hand in'the presence of twosubscribing W nesses.

HUWARD MCQUILTQEN.

In the presence of- STANLEY W. (3001;, MARY Ii ALLEN,

